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#5809035 - 06/28/15 02:39 PM Good idea to retest your load once you change powder lots.
FiremanJG Online   content
THF Celebrity

Registered: 12/16/08
Posts: 21784
Loc: Wolfe City, TX
I ran out of the old lot of H-4350. The former load was 42.4 gr. The Heatstroke open is in a couple of weeks so I had better make darn sure the rifle and load are in top shape. I did load 50 of 42.4 gr and had immediately notcied the new lot of powder was slower than the old lot. Old DOPE no longer worked 500 yards +. So I loaded these test groups and tried them yesterday. The wind was not helping, but I had to do it when I had the time. The first group I purposfully dialed less elevation than what I needed for 300 yards. Every subsequent group I dialed up .3 Mil higher to spread them out for reading.

No pressure signs on anything, and 42.8 gr clocked in an average MV of 2838 fps with a 140 gr. A-max. ES of 11.

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#5809074 - 06/28/15 03:12 PM Re: Good idea to retest your load once you change powder lots. [Re: FiremanJG]
Bbear Offline
Tracker

Registered: 11/24/13
Posts: 772
Loc: West Texas
+1. I do the same every time I open a new lot.
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#5809279 - 06/28/15 06:26 PM Re: Good idea to retest your load once you change powder lots. [Re: FiremanJG]
ChadTRG42 Offline
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Registered: 09/16/09
Posts: 11492
Loc: Lewisville, TX
You got it!! Every time! I try to buy 2- 8# jugs (16 lbs) of the same powder lot for 1 barrel. With a 6.5 case that will get about 2800-3000 rounds, or 1 barrel worth.
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#5809285 - 06/28/15 06:32 PM Re: Good idea to retest your load once you change powder lots. [Re: ChadTRG42]
FiremanJG Online   content
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Registered: 12/16/08
Posts: 21784
Loc: Wolfe City, TX
I didn't have 16 of the same lot when I cooked the 260 barrel and started on the 6.5 Creedmoor barrel. Had two different powder lots of 8 pounders. Gotta do what I gotta do.

Now if someone could find for me 16 pounds of H-4350 I'll be set for the next barrel.
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#5809526 - 06/28/15 10:12 PM Re: Good idea to retest your load once you change powder lots. [Re: FiremanJG]
blackcoal Offline
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Registered: 01/19/12
Posts: 9078
Loc: 60 Mi North of DFW
Mix the powders thoroughly and then pour it back into the containers. You can do this with two eight #s or eleven one #s or whatever amount you have. Worked back in the 70's and will work today.
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#5809645 - 06/29/15 05:51 AM Re: Good idea to retest your load once you change powder lots. [Re: blackcoal]
FiremanJG Online   content
THF Celebrity

Registered: 12/16/08
Posts: 21784
Loc: Wolfe City, TX
Yessir. The two eights I have left are different lots and I remembered that trick right after I loaded these. hammer

Not a huge problem. Once I get into the next 8 I'll load these four test groups again.
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#5809664 - 06/29/15 06:18 AM Re: Good idea to retest your load once you change powder lots. [Re: FiremanJG]
dee Online   content
THF Trophy Hunter

Registered: 04/10/10
Posts: 5060
Loc: Red River way
Good luck finding any more H4350. I'm going to try the new imr as it's a good bit more available.
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